Enjoyed the tasting and bought a case of wine, but...

Enjoyed the tasting and bought a case of wine, but we discovered afterwards that we were overcharged for a total of over $120. I called and emailed numerous times to ask for a refund, and each time I was told a refund would be sent - only to receive nothing, with no updates on when I should expect it. It's been nearly a month and I still have not received the money back. Very frustrated with this experience.